Sound-producing device.



G. MAGLOSKIE.

SOUND PRODUCING DEVICE.

APPLICATION FILED JULY 25, 190B.

. Patentd Mar.29, 1910.

Inventor: Geor' em closkie, by

. UNITED STATES PATENT orn on.

GEORGE MACLOSRIE, OF'SCHENECTA'DY, NEW YORK, ASSIGNOR T0 GENERALELECTRIC COMPANY, A CORPORATION OI NEW YORK.

SOUND-PRODUCING DEVICE.

Specification of Letters Patent.

Patented Mar. 29, 1910.

Application filed July 25, 1908. Serial No. 445,292.

To all whom it may concern:

Be it known that I, Gnonon MACLOSKIE, a citizen of the United States,residing at Schenectady, in the county of Schenectady, State of NewYork, have invented certain new and useful Improvements in Sound-Producing Devices, of which the following is a specification.

My invention relates to a sound producing device and has for its objectsuch a device which is of simple construction and which produces a loudsound with the use of a small amount of fluid under ipressure ascompared with the amount of lid used to operate the well-known organpipe whistle.

. My invention consists in a sound producing device comprising a member,a diaphragm fastened in said member, said member having a passagecommunicating with both sides of said diaphragm and other passagesalternately opened and closed by the vibration of said diaphragm.

In another aspect, my invention consists in a sound producing devicecomprising two resonators, a member, a diaphragm fastened in said memberand arranged to vibrate be tween said resonators, said member havingpassages for admitting fluid alternately into said resonators.

Other features of my invention are pointed out with particularity in theclaims annexed to and forming a part of this specification. For a betterunderstanding of my invention, however, reference may be had to thefollowing description taken in connection with the "accompanyingdrawing, in which Figure 1 is a sectional view of a sound producingdevice embodying my invention, and Fig. 2 is an end view of the samewith .parts broken away to show the interior construction.

Referring to the drawing, the diaphragm 1 is fastened in the member 2,between the bells or resonators 3 and 3. The passages 4 and 4 connectthe resonators to the chambers 5 and 5, situated on either side of thediaphragm. The pipe 6 is connected to one side of the valve 7, while theipe 6, is con- 1 nected to theother side. ommunication from the pipe 6to the chambers 5 and 5 is had by means of the passage 8 and thepassages 9 and 9'.

The member 2 is made up of two parts the diaphragm, which 1s pre erablycircular in shape, against the part 10 and holds its outer edge firmlyin place against vibration. The parts 10 and 10 with the diaphragm inplace may be clamped together by any suitable means, such as the bolts12. The middle portion of the diaphragm is unsupported, and as thediaphragm is made of flexible material, such as leather, it may vibrateback and forth between the resonators 3 and 3.- The chambers 5 and 5 arepreferably annular in shape and concentric with the diaphragm.

In the operation of my sound producing device, fluid under pressure,such as steam or compressed air, is admitted to the ipe 6 from asuitable source, such as a boi or or a motor-driven air compressor. Bypulling on the lever 13 the valve 7 is opened, the fluid is admittedinto the pipe 6', passes through the passages 8 and 9 into the chamber5, causing a pressure upon the diaphragm and the closing of the passage4, the fluid in the chamber 5 escaping through the passage 4 into theresonator 3. The closing of the passage 4 causes the pressure of thefluid in chamber 5 to exceed that in chamber 5. This excess of pressurewill be sufficient to move the diaphragm in the opposite direction andclose the passage 4, the

uid meanwhile escaping from the chamber 5 into the resonator 3 In thisway the diaphragm will move back and forth alternately closin andopening the passages 4 and 4, and s ort pufi's of steam or air are sentout of the resonators, the column of air in the resonators being throwninto rapid vibration. This vibration produces a musical note, the pitchof which de ends upon the length of the resonators, an its loudness agreat deal upon the megaphone arrangement of the resonators, that is,upon the divergence of their sides.

I desire it to be understood that my invention is not limited to theparticular construction shown and described, and I aim in the ap endedclaims to cover all modifioa tions whlch do not depart from the spiritand scope of my invention.

having passages for admitting fluid alter- What I claim as new anddesire to secure by Letters Patent of the United States, is:

1. A sound producin device comprising a member, a diaphragm astened insaid member, said member having a passage communicating with both sidesof said diaphragm and other passages alternately opened and closed bythe vibration of said diaphragm.

2. A sound producing device'comprismg a member, a diaphragm fastened insaid member, said member having chambers on both sides of saiddiaphragm, a passage communicating withsaid chambers and other passageson both sides of said diaphragm alternately opened and closed by thevibration of said diaphragm.

3. A sound producing device comprising two resonators, a member, adiaphragm fastened in said member and arranged to vibrate betweensaidresonators, said member nately into said resonators.

4. A sound producing device comprising two resonators, a member, adiaphragm fastened in said member and arranged to vibrate between saidresonators, said member having chambers on both sides of said diaphragm,a passage communicating with said chambers and other passages foradmitting fluid alternately into-said resonators.

5. A sound producing device comprising two resonators, a diaphragmarranged tovibrate between said resonators, and a member having passagesfor admitting fluid to both sides of said diaphragm, and other passagescommunicating with saidresonators.

6. A sound producing device comprising two resonators, a-member, adiaphragm fastened in said member, said member having chambers on bothsides of said diaphragm, a passage communicating with said chambers andother passages on both sides of said diaphragm alternately openedand'closed by the vibration of said diaphragm and communicating with.said resonators.

7. A sound producing device comprising tworesonators, a member, adiaphragm fastened in said member and arrangedto vibrate between saidresonators, said member having annular chambers on both sides of saiddiaphragm, a passage communicating with said chambers and other passageson both sides of said diaphragm alternately opened and closed by'thevibration of said diaphragm and communicating with said resonators.

In witness whereof, I have hereunto set my hand this 23rd da of. July,1908.

GEORCgE MAOLOSKIE. Witnesses:

BENJAMIN B. HULL,

HELEN ORFORD.

